The Darn Tough Style T4021 Tactical Midweight Boot Sock is a fine-gauge merino wool sock with mid-level cushion density throughout the foot. The knit is tight enough to cut abrasion inside a boot and resilient enough to hold shape across long shifts on hard ground. True Seamless toe fusion eliminates the toe seam that causes rub and hot spots.
Mid-calf boot height keeps the top of the boot from biting into the lower leg, and the 62% merino wool / 36% nylon / 2% Lycra blend wicks sweat fast, resists odor through consecutive wears, and regulates temperature across hot and cold climates. Built for duty, training, and long days on foot — sized and cut to fit under a standard tactical boot without bunching.
Darn Tough knits every pair at their family mill in Northfield, Vermont, and every pair — including this one — is covered by an unconditional lifetime guarantee.






